I have a PNG logo on a transparent background which has areas of pure white (#ffffff) and also pure black in addition to a wide assortment of other colors (logo includes a topo map). Am trying to create a vector image since many places prefer such for inclusion with other logos, etc. This is my first use of inkscape.
Following other on-line procedures, after importing PNG I used 'Select All' and 'Trace Bitmap' with "Multiple scans: Colors: 32", "Stack scans", and "Remove background". The white areas still appeared white - but when I saved as a SVG and examined with editor I saw that the graphic is still included. (I had been expecting it to be removed with selection of "Remove background"). I used an editor to remove the graphic section, but found the resulting SVG then displays the original "white" areas as transparent, not white.
I tried many different variations hoping to stumble up something which which fix this behaviour, i.e. treat "white" as an actual color to be traced ala all the other colors - but could not find anything that worked.
Finally I altered the PNG being imported to replace all its "white" #ffffff with near-white #fefefe, thinking that would not be considered "background". But to my surprise, the near-white area was again not traced, resulting in a transparent area.
So cannot find a way to create a vector image from this logo containing "white" (or "near-white") and am hoping some more experienced user can provide a method of doing so.
PS: white area need to be white so logo can be placed a non-white background